12
Caution
•
Do not use the controller (BLDC M/C UNIT) below 10%.
Warning
•
Do not operate when suction valve and discharge valve are closed or do not close suction
valve and discharge valve during operation. Pump and piping may be damaged with excessive
pressure rising and liquid may spout when operation under valve closing.
10-1 Preparation
When operating pump for the first time after installation, please check the following conditions.
Check if there is oil leakage caused by any damaged parts or loosened bolt.
Check the oil gauge to see if the driving part of pump is filled with the oil of regulated amount.
(The normal position of the oil level is the middle red point of the gauge.)
Check if all of accessories, liquid to be transferred, and power supply necessary for pump operation are ready.
10-2 Operation
Open the suction and discharge valves.
Check the rated power and turn on the pump. Check if the motor fan rotates clockwise.
(This is only for inverter or general motor)
Open the discharge side up to the atmospheric pressure, and increase the discharge amount slowly
up to 50%. Connect to the flange of the discharge side, and then operate test run for 30minutes.
Caution) When the ambient temperature is low, overload may occur temporarily due to low
temperature of lubricant. Wait until the lubricant temperature increases with no load.
If there is no error found during test run, set the discharge capacity to 100% and increase the
pressure of the discharge side up to the setting one. Check if the BLDC controller works properly
and if every part works properly.
10-3 Control of discharge amount
The discharge amount can be controlled by the controller (BLDC M/C UNIT).
The controller can operate within 10 ~ 100%, but its effective flow rate-controllable range is
20 ~ 100%. (Within 20 ~ 100%, the discharge amount is stable)
10-4 Restart of pump
In case of stop pump operation for short period(less than 1 week), run the pump at a desired stroke
length & prescribed discharge pressure after air bleed operation.
In case of stop pump operation for a long period(more than 1 week), the pump should be run at
atmospheric pressure of discharge side for several minutes before going into normal operation.
Do not start regular operation before above warming up.(Set the controller to 50%)
10
Operation
Caution
•
Some water may be remained in the liquid end part of pump after final performance test.
In case of use for some liquids reacting radically to water, remove water in the pump and dry
the pump necessarily.